// JavaScript Document

function hasClass(element,_className){
if(!element){
return;
}
var upperClass=_className.toUpperCase();
if(element.className){
var classes=element.className.split(' ');
for(var i=0;i<classes.length;i++){
if(classes[i].toUpperCase()==upperClass){
return true;
}
}
}
return false;
}

function addClass(element,_class){
if(!hasClass(element,_class)){
element.className+=element.className?(" "+_class):_class;
}
}


function removeClass(element,_class){
var upperClass=_class.toUpperCase();
var remainingClasses=[];
if(element.className){
var classes=element.className.split(' ');
for(var i=0;i<classes.length;i++){
if(classes[i].toUpperCase()!=upperClass){
remainingClasses[remainingClasses.length]=classes[i];
}
}
element.className=remainingClasses.join(' ');
}
}